Inside Back Cover: Cation‐Radius‐Controlled Sn‐O Bond Length Boosting CO2 Electroreduction over Sn‐Based Perovskite Oxides

Sn-based perovskite oxides have shown intriguing potential in CO2 electroreduction. In their Research Article (e202305530), Jiawei Zhu and co-workers report an effective strategy to promote CO2-to-HCOOH conversion of Sn-based perovskite oxides by A-site-radius-controlled Sn−O bond lengths. With Ba1−xSrxSnO3 (x from 0 to 1) series as proof-of-concept catalysts, it is demonstrated that their activity/selectivity for HCOOH featured a volcano-type dependence on the Sn−O bond lengths, with a maximum point corresponding to Ba0.5Sr0.5SnO3.